Finding the Fourth Proportional to 1,342.38, 1,852.62 and 818.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.38 : 1,852.62 = 818.72 : x
2. Step 2: Convert to fraction form
   1,342.38/1,852.62 = 818.72/x
3. Step 3: Cross multiply
   1,342.38x = 1,852.62 × 818.72
4. Step 4: Simplify right side
   1,342.38x = 1,516,777.05
5. Step 5: Solve for x
   x = 1,516,777.05/1,342.38
6. Step 6: Final answer
   x = 1,129.92